patest_dither.c File Reference

Attempt to hear difference between dithered and non-dithered signal. More...

#include <stdio.h>
#include <math.h>
#include "portaudio.h"

Data Structures
struct	paTestData

Macros
#define	NUM_SECONDS   (5)
#define	SAMPLE_RATE   (44100)
#define	M_PI   (3.14159265)
#define	TABLE_SIZE   (200)

Typedefs
typedef struct paTestData	paTestData

Functions
PaError	PlaySine (paTestData *data, PaStreamFlags flags, float amplitude)
int	main (void)

Detailed Description

Attempt to hear difference between dithered and non-dithered signal.

This only has an effect if the native format is 16 bit.

Author

Phil Burk http://www.softsynth.com

Macro Definition Documentation

M_PI

#define M_PI   (3.14159265)

Referenced by main().

NUM_SECONDS

#define NUM_SECONDS   (5)

Referenced by PlaySine().

SAMPLE_RATE

#define SAMPLE_RATE   (44100)

Referenced by PlaySine().

TABLE_SIZE

#define TABLE_SIZE   (200)

Referenced by main().

Typedef Documentation

paTestData

typedef struct paTestData paTestData

Function Documentation

main()

int main

(

void

)

References M_PI, Pa_GetErrorText(), paClipOff, paDitherOff, paNoFlag, PlaySine(), paTestData::sine, and TABLE_SIZE.

PlaySine()

PaError PlaySine	(	paTestData *	data,
		PaStreamFlags	flags,
		float	amplitude )

References paTestData::amplitude, PaStreamParameters::channelCount, PaDeviceInfo::defaultLowOutputLatency, PaStreamParameters::device, PaStreamParameters::hostApiSpecificStreamInfo, paTestData::left_phase, NUM_SECONDS, Pa_CloseStream(), Pa_GetDefaultOutputDevice(), Pa_GetDeviceInfo(), Pa_GetStreamCpuLoad(), Pa_Initialize(), Pa_OpenStream(), Pa_Sleep(), Pa_StartStream(), Pa_Terminate(), paFloat32, paNoDevice, paNoError, paTestData::right_phase, SAMPLE_RATE, PaStreamParameters::sampleFormat, and PaStreamParameters::suggestedLatency.

Referenced by main().